40643471 has 16 divisors (see below), whose sum is σ = 46949760. Its totient is φ = 34833120.

The previous prime is 40643443. The next prime is 40643483. The reversal of 40643471 is 17434604.

It is a cyclic number.

It is not a de Polignac number, because 40643471 - 2¹⁰ = 40642447 is a prime.

It is a super-3 number, since 3×40643471³ (a number of 24 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40643401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12236 + ... + 15198.

It is an arithmetic number, because the mean of its divisors is an integer number (2934360).

Almost surely, 2^40643471 is an apocalyptic number.

40643471 is a deficient number, since it is larger than the sum of its proper divisors (6306289).

40643471 is a wasteful number, since it uses less digits than its factorization.

40643471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3046.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 40643471 is about 6375.2232117785. The cubic root of 40643471 is about 343.8193091760.

It can be divided in two parts, 40643 and 471, that added together give a palindrome (41114).

The spelling of 40643471 in words is "forty million, six hundred forty-three thousand, four hundred seventy-one".